50757721 has 8 divisors (see below), whose sum is σ = 61062080. Its totient is φ = 41216688.

The previous prime is 50757719. The next prime is 50757731. The reversal of 50757721 is 12775705.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50757721 - 2¹ = 50757719 is a prime.

It is a super-2 number, since 2×50757721² = 5152692482227682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50757731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190686 + ... + 190951.

It is an arithmetic number, because the mean of its divisors is an integer number (7632760).

Almost surely, 2^50757721 is an apocalyptic number.

It is an amenable number.

50757721 is a deficient number, since it is larger than the sum of its proper divisors (10304359).

50757721 is a wasteful number, since it uses less digits than its factorization.

50757721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381663.

The product of its (nonzero) digits is 17150, while the sum is 34.

The square root of 50757721 is about 7124.4453117418. The cubic root of 50757721 is about 370.2548062220.

The spelling of 50757721 in words is "fifty million, seven hundred fifty-seven thousand, seven hundred twenty-one".